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87 Commits

Author SHA1 Message Date
gatecat
d08fb255a2 router2: Fix uninitialised values 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-09-06 13:29:23 +01:00
gatecat
01b51fb715 router2: Fix explored count 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-09-02 17:08:54 +01:00
gatecat
f207068ee2 router2: Add experimental timing-driven ripup option 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-08-15 16:22:03 +01:00
gatecat
42522c492c router2: Alternative congestion cost schedule 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-08-15 16:22:03 +01:00
gatecat
2a856db72c router2: Adding some criticality heuristics 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-08-15 16:22:03 +01:00
gatecat
64f6b8bc67 router2: Improved bidir routing and data structures 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-08-15 16:22:03 +01:00
gatecat
b5a31d2e4e router2: Mark dest as visited during backwards routing 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-30 09:14:46 +01:00
gatecat
42f48b6dc0 router2: Improve debugability of pip conflicts 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-29 13:04:59 +01:00
gatecat
504199e70e nexus: Fix routeing of global clocks that also drive fabric 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-28 15:35:19 +01:00
gatecat
ce92cdf8e4 router2: Update route delays even when routes are congested 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-28 12:15:36 +01:00
gatecat
31abefc8e4 interchange: Allow pseudo pip wires to overlap with bound site wires on the same net 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-06 10:38:08 +01:00
gatecat
6fe071ad1d router2: Dump pre-bound routes when routing fails in debug mode 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-06 10:21:31 +01:00
gatecat
2ffb081442 Fixing old emails and names in copyrights 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-06-12 13:22:38 +01:00
gatecat
f4fed62c05 Use hashlib in routers 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-06-02 15:04:53 +01:00
gatecat
579b98c596 Use hashlib for core netlist structures 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-06-02 14:27:56 +01:00
gatecat
1595c07260 router2: Add heatmap by routing resource type 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-20 14:54:23 +01:00
gatecat
5a41d2070c Run clangformat 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-16 16:25:05 +01:00
gatecat
3bb94192d5 mistral: Tidying up 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-15 14:54:33 +01:00
gatecat
f318898474 router2: Hacky workaround for slow Cyclone V convergence 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-15 14:54:33 +01:00
gatecat
511e46c40f router2: Reduce verbosity when debugging 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-15 14:54:33 +01:00
gatecat
ee60e9c71c router2: Add some boundness statistics 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-12 12:18:58 +01:00
gatecat
e9fdbf618c router2: Fix a typo 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-11 13:02:23 +01:00
gatecat
65c611da02 router2: Reserve wires in more complex cases 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-06 21:20:09 +01:00
gatecat
62613cb266 router2: Dynamicly expand bounding box based on congestion 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-05-06 19:04:24 +01:00
Keith Rothman
a519341112 Fix bug in router2 where router may give up too early. 
Was introduced in #612.  The logic before was intended to prevent the
router from terminating early when not using a bounding box, but the fix
in #612 simply removed that, meaning that the router might terminate
early incorrectly.  The solution here is to only use the toexplore
hysteric once a solution is found.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-04-06 10:22:47 -07:00
Keith Rothman
e7d81913a4 Add "checkPipAvailForNet" to Arch API. 
This is important for distiguishing valid pseudo pips in the FPGA
interchange arch. This also avoids a double or triple lookup of
pip->net map.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-22 09:17:55 -07:00
Keith Rothman
965ba00e0f Moving hash map/set type selection to header. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-17 16:54:29 -07:00
Keith Rothman
351ca3b5ea Use NEXTPNR_NAMESPACE macro's now that headers are seperated. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-15 18:49:12 +00:00
Keith Rothman
a342ae56e0 Add support for partially routed nets from the placer in router2. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-12 09:53:15 -08:00
Keith Rothman
7168cf8657 Add diagnostic prints to debug lookahead performance. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-10 09:12:50 -08:00
whitequark
979e7b8709 Only depend on Abseil in threaded builds. 
Abseil has a hard dependency on threads (not just in the build system
but in many places in the base libraries), so there is no way to use
it on WASI at the moment.
 2021-03-10 06:18:42 +00:00
gatecat
d1f44fe91a
Merge pull request #607 from litghost/add_absl_flat_hash_map 
Add absl::flat_hash_map.
 2021-03-09 08:48:25 +00:00
gatecat
326b34887c
Merge pull request #609 from YosysHQ/gatecat/sta-v2 
Use new timing engine for criticality
 2021-03-09 08:48:12 +00:00
gatecat
da88d3d825 router2: Fix vast perf drop when leaving bounding box 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-03-08 15:06:30 +00:00
gatecat
1ff2023f32 timing: Replace all users of criticality with new engine 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-03-04 11:29:11 +00:00
Keith Rothman
0afa0da19f Add absl::flat_hash_map. 
This lowers the CPU cost of using the flat wire map in router2, and should
use less memory as well.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-01 09:55:54 -08:00
Keith Rothman
99a2262d61 Use scope in router1/2 and placer1. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-01 09:43:39 -08:00
Keith Rothman
c64a910151 Allow router2 to use routed but not fixed arcs. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-25 15:55:29 -08:00
gatecat
23413a4d12 Fix compiler warnings introduced by -Wextra 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-02-25 15:15:25 +00:00
gatecat
7c7d69e1d2 router2: Support for multiple bel pins per cell pin 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-02-10 15:14:44 +00:00
gatecat
535723f414 Start making use of getBelPinsForCellPin API 
This replaces getNetinfoSinkWire with 3 new functions for different use
cases.

At the moment all existing code has been moved to getNetinfoSinkWire
with phys_idx=0 so the build doesn't break; but this won't yet function
properly with more than one sink. But it provides a base on which to
work on refactoring the routers to support this case.

Signed-off-by: gatecat <gatecat@ds0.me>
 2021-02-10 14:18:12 +00:00
D. Shah
94e8847d67 cleanup: Spelling fixes 
Signed-off-by: D. Shah <dave@ds0.me>
 2021-01-28 15:19:06 +00:00
D. Shah
5fc3e8e4d2 cleanup: Fix compiler warnings 
Signed-off-by: D. Shah <dave@ds0.me>
 2021-01-28 15:02:08 +00:00
David Shah
402819c64b router2: Avoid ripup of critical path 
Signed-off-by: David Shah <dave@ds0.me>
 2020-12-01 09:54:19 +00:00
David Shah
3503f4e907 router2: Make splitting of wires thread-safe 
Signed-off-by: David Shah <dave@ds0.me>
 2020-12-01 09:38:52 +00:00
David Shah
b6c91d1621 router2: Add per-thread rng 
Signed-off-by: David Shah <dave@ds0.me>
 2020-12-01 09:21:44 +00:00
David Shah
5e90086d4f router2: Fix case where src and dst are the same 
Signed-off-by: David Shah <dave@ds0.me>
 2020-11-30 08:45:28 +00:00
whitequark
e7bb04769d Port nextpnr-{ice40,ecp5} to WASI. 
This involves very few changes, all typical to WASM ports:
  * WASM doesn't currently support threads or atomics so those are
    disabled.
  * WASM doesn't currently support exceptions so the exception
    machinery is stubbed out.
  * WASM doesn't (and can't) have mmap(), so an emulation library is
    used. That library currently doesn't support MAP_SHARED flags,
    so MAP_PRIVATE is used instead.

There is also an update to bring ECP5 bbasm CMake rules to parity
with iCE40 ones, since although it is possible to embed chipdb into
nextpnr on WASM, a 200 MB WASM file has very few practical uses.

The README is not updated and there is no included toolchain file
because at the moment it's not possible to build nextpnr with
upstream boost and wasi-libc. Boost requires a patch (merged, will
be available in boost 1.74.0), wasi-libc requires a few unmerged
patches.
 2020-05-23 20:57:26 +00:00
David Shah
4b54253c24 router2: Prevent overflow 
Signed-off-by: David Shah <dave@ds0.me>
 2020-03-22 21:17:59 +00:00
David Shah
2248e07b66 router2: Improve flow and log output 
Signed-off-by: David Shah <dave@ds0.me>
 2020-02-03 13:46:05 +00:00